Spectrum Posters

Radio is tough to understand intuitively. There’s plenty of physics to describe its behavior, but it can’t be seen, smelt, felt or heard without special equipment. Radio waves travel without a medium, so the common terminology of “airwaves” is quite misleading. There’s no need for air. Defining it as “wireless” is not helpful. That doesn’t tell us what it is, just what it’s not. Radio is gerbilless too but so what?